The opening is slightly minty and grassy, but seriously only lasts 15 minutes. From then on Nu Green smells mostly like fruit loops and musky pear (this is the ambrette seed, AKA "botanical musk"). It's a playful, youthful and clean musk scent. After it dries down, Nu Green lasts about an hour to 2 hours (depending on how much you apply and where you apply it) before becoming a skin scent, which is only noticeable if you shove your nose into it. Longevity can be increased by applying Nu Green to your clothes.
Overall, this the best of the Honore de Pres line, but I prefer L'artisan Parfumeur's L'eau de Jatamansi and Cote D'Amour to this, as they are much more complex and last at least twice as long. Still, Nu Green is a great achievement in terms of being a well composed, all natural and organic fragrance.